We're going to solve 7858 multiplied by 2670
7858 × 2670 = 2670 × (7858)
+ 2670 × 8 what gives us 21360
+ 2670 × 50 yielding 133500
+ 2670 × 800 yielding 2136000
+ 2670 × 7000 that equals 18690000

= 20980860
