No problem, we've got 64678398 and 77987772 to multiply
64678398 × 77987772 = 77987772 × (64678398)
+ 77987772 × 8 what gives us 623902176
+ 77987772 × 90 that is equal 7018899480
+ 77987772 × 300 yielding 23396331600
+ 77987772 × 8000 that equals 623902176000
+ 77987772 × 70000 resulting in 5459144040000
+ 77987772 × 600000 which equals 46792663200000
+ 77987772 × 4000000 that is equal 311951088000000
+ 77987772 × 60000000 giving us 4679266320000000

= 5044124156549256
