No problem, we've got 7770 and 5139 to multiply
7770 × 5139 = 5139 × (7770)
+ 5139 × 0 that equals 0
+ 5139 × 70 giving us 359730
+ 5139 × 700 producing 3597300
+ 5139 × 7000 what gives us 35973000

= 39930030
