No problem, we've got 27427464 and 15311015 to multiply
27427464 × 15311015 = 15311015 × (27427464)
+ 15311015 × 4 which equals 61244060
+ 15311015 × 60 producing 918660900
+ 15311015 × 400 that is equal 6124406000
+ 15311015 × 7000 which equals 107177105000
+ 15311015 × 20000 giving us 306220300000
+ 15311015 × 400000 that is equal 6124406000000
+ 15311015 × 7000000 resulting in 107177105000000
+ 15311015 × 20000000 producing 306220300000000

= 419942312715960
