Complete the following expression.
$4000$4000$=$=$\editable{}$$\times$×$10^3$103
Complete the following expression.
Given that $1$1÷$10$10 = $1\times\frac{1}{10}=1\times10^{-1}$1×110=1×10−1,
Express $7$7÷$10^2$102 in scientific notation form.
Consider the expression $3\times10^5\times7\times10^2$3×105×7×102.