Let's roll up our sleeves and solve this. We have 5 and we're going to multiply it by 77, essentially adding 5 to itself 77 times.
Step 1: 0 + 5 = 5
Step 2: 5 + 5 = 10
Step 3: 10 + 5 = 15
Step 4: 15 + 5 = 20
Step 5: 20 + 5 = 25
Step 6: 25 + 5 = 30
Step 7: 30 + 5 = 35
Step 8: 35 + 5 = 40
Step 9: 40 + 5 = 45
Step 10: 45 + 5 = 50
Step 11: 50 + 5 = 55
Step 12: 55 + 5 = 60
Step 13: 60 + 5 = 65
Step 14: 65 + 5 = 70
Step 15: 70 + 5 = 75
Step 16: 75 + 5 = 80
Step 17: 80 + 5 = 85
Step 18: 85 + 5 = 90
Step 19: 90 + 5 = 95
Step 20: 95 + 5 = 100
Step 21: 100 + 5 = 105
Step 22: 105 + 5 = 110
Step 23: 110 + 5 = 115
Step 24: 115 + 5 = 120
Step 25: 120 + 5 = 125
Step 26: 125 + 5 = 130
Step 27: 130 + 5 = 135
Step 28: 135 + 5 = 140
Step 29: 140 + 5 = 145
Step 30: 145 + 5 = 150
Step 31: 150 + 5 = 155
Step 32: 155 + 5 = 160
Step 33: 160 + 5 = 165
Step 34: 165 + 5 = 170
Step 35: 170 + 5 = 175
Step 36: 175 + 5 = 180
Step 37: 180 + 5 = 185
Step 38: 185 + 5 = 190
Step 39: 190 + 5 = 195
Step 40: 195 + 5 = 200
Step 41: 200 + 5 = 205
Step 42: 205 + 5 = 210
Step 43: 210 + 5 = 215
Step 44: 215 + 5 = 220
Step 45: 220 + 5 = 225
Step 46: 225 + 5 = 230
Step 47: 230 + 5 = 235
Step 48: 235 + 5 = 240
Step 49: 240 + 5 = 245
Step 50: 245 + 5 = 250
Step 51: 250 + 5 = 255
Step 52: 255 + 5 = 260
Step 53: 260 + 5 = 265
Step 54: 265 + 5 = 270
Step 55: 270 + 5 = 275
Step 56: 275 + 5 = 280
Step 57: 280 + 5 = 285
Step 58: 285 + 5 = 290
Step 59: 290 + 5 = 295
Step 60: 295 + 5 = 300
Step 61: 300 + 5 = 305
Step 62: 305 + 5 = 310
Step 63: 310 + 5 = 315
Step 64: 315 + 5 = 320
Step 65: 320 + 5 = 325
Step 66: 325 + 5 = 330
Step 67: 330 + 5 = 335
Step 68: 335 + 5 = 340
Step 69: 340 + 5 = 345
Step 70: 345 + 5 = 350
Step 71: 350 + 5 = 355
Step 72: 355 + 5 = 360
Step 73: 360 + 5 = 365
Step 74: 365 + 5 = 370
Step 75: 370 + 5 = 375
Step 76: 375 + 5 = 380
Step 77: 380 + 5 = 385

So, 5*77 = 385