Question

1+1-1+2 x (a raiz de 400 multiplicado por 300000)

Answer 1

1+1-1+2 = 3
$\sqrt{400} = 20$
20 * 300.000 = 6.000,000 = 6x$10^{6}$
3 x 6x$10^{6}$ = 18x$10^{6}$