No problem, we've got 47509583 and 21000067 to multiply
47509583 × 21000067 = 21000067 × (47509583)
+ 21000067 × 3 producing 63000201
+ 21000067 × 80 which equals 1680005360
+ 21000067 × 500 what gives us 10500033500
+ 21000067 × 9000 that results in 189000603000
+ 21000067 × 00000 which equals 0
+ 21000067 × 500000 what gives us 10500033500000
+ 21000067 × 7000000 yielding 147000469000000
+ 21000067 × 40000000 yielding 840002680000000

= 997704426142061
