No problem, we've got 42385317 and 16120697 to multiply
42385317 × 16120697 = 16120697 × (42385317)
+ 16120697 × 7 what gives us 112844879
+ 16120697 × 10 that results in 161206970
+ 16120697 × 300 which equals 4836209100
+ 16120697 × 5000 that equals 80603485000
+ 16120697 × 80000 what gives us 1289655760000
+ 16120697 × 300000 that is equal 4836209100000
+ 16120697 × 2000000 giving us 32241394000000
+ 16120697 × 40000000 yielding 644827880000000

= 683280852605949
