10 to the power of 3 times what equals 630
10³ · x = 630x = ?10³ = 10 × 10 × 10 = 1,000630 ÷ 1000 = x630 ÷ 1000 = 0.63x = 0.63So we have:10³ · 0.63 = 630
10+10+10+10+10+10+10+10