No problem, we've got 84172942 and 60960084 to multiply
84172942 × 60960084 = 60960084 × (84172942)
+ 60960084 × 2 which equals 121920168
+ 60960084 × 40 producing 2438403360
+ 60960084 × 900 what gives us 54864075600
+ 60960084 × 2000 that results in 121920168000
+ 60960084 × 70000 that is equal 4267205880000
+ 60960084 × 100000 yielding 6096008400000
+ 60960084 × 4000000 which equals 243840336000000
+ 60960084 × 80000000 which equals 4876806720000000

= 5131189614847128
