No problem, we've got 9893 and 7900 to multiply
9893 × 7900 = 7900 × (9893)
+ 7900 × 3 that is equal 23700
+ 7900 × 90 resulting in 711000
+ 7900 × 800 giving us 6320000
+ 7900 × 9000 resulting in 71100000

= 78154700
