We're going to solve 6428 multiplied by 1185
6428 × 1185 = 1185 × (6428)
+ 1185 × 8 that equals 9480
+ 1185 × 20 what gives us 23700
+ 1185 × 400 that equals 474000
+ 1185 × 6000 giving us 7110000

= 7617180
