No problem, we've got 16781939 and 20957426 to multiply
16781939 × 20957426 = 20957426 × (16781939)
+ 20957426 × 9 that equals 188616834
+ 20957426 × 30 yielding 628722780
+ 20957426 × 900 that is equal 18861683400
+ 20957426 × 1000 that is equal 20957426000
+ 20957426 × 80000 what gives us 1676594080000
+ 20957426 × 700000 which equals 14670198200000
+ 20957426 × 6000000 which equals 125744556000000
+ 20957426 × 10000000 that equals 209574260000000

= 351706244729014
