No problem, we've got 2578 and 7876 to multiply
2578 × 7876 = 7876 × (2578)
+ 7876 × 8 that equals 63008
+ 7876 × 70 what gives us 551320
+ 7876 × 500 yielding 3938000
+ 7876 × 2000 that results in 15752000

= 20304328
