No problem, we've got 20618737 and 18619939 to multiply
20618737 × 18619939 = 18619939 × (20618737)
+ 18619939 × 7 that results in 130339573
+ 18619939 × 30 giving us 558598170
+ 18619939 × 700 what gives us 13033957300
+ 18619939 × 8000 that results in 148959512000
+ 18619939 × 10000 that results in 186199390000
+ 18619939 × 600000 resulting in 11171963400000
+ 18619939 × 0000000 that equals 0
+ 18619939 × 20000000 what gives us 372398780000000

= 383919625197043
