No problem, we've got 7377484 and 21221539 to multiply
7377484 × 21221539 = 21221539 × (7377484)
+ 21221539 × 4 what gives us 84886156
+ 21221539 × 80 that equals 1697723120
+ 21221539 × 400 what gives us 8488615600
+ 21221539 × 7000 which equals 148550773000
+ 21221539 × 70000 giving us 1485507730000
+ 21221539 × 300000 producing 6366461700000
+ 21221539 × 7000000 yielding 148550773000000

= 156561564427876
