Let's roll up our sleeves and solve this. We have 25 and we're going to multiply it by 14, essentially adding 25 to itself 14 times.
Step 1: 0 + 25 = 25
Step 2: 25 + 25 = 50
Step 3: 50 + 25 = 75
Step 4: 75 + 25 = 100
Step 5: 100 + 25 = 125
Step 6: 125 + 25 = 150
Step 7: 150 + 25 = 175
Step 8: 175 + 25 = 200
Step 9: 200 + 25 = 225
Step 10: 225 + 25 = 250
Step 11: 250 + 25 = 275
Step 12: 275 + 25 = 300
Step 13: 300 + 25 = 325
Step 14: 325 + 25 = 350

So, 25*14 = 350