No problem, we've got 5478 and 7836 to multiply
5478 × 7836 = 7836 × (5478)
+ 7836 × 8 yielding 62688
+ 7836 × 70 that results in 548520
+ 7836 × 400 what gives us 3134400
+ 7836 × 5000 yielding 39180000

= 42925608
