No problem, we've got 9877 and 7851 to multiply
9877 × 7851 = 7851 × (9877)
+ 7851 × 7 that results in 54957
+ 7851 × 70 that equals 549570
+ 7851 × 800 that results in 6280800
+ 7851 × 9000 which equals 70659000

= 77544327
