bonjour
4.6 milliard = 4.6 * 10 ⁹
1 391 000 = 1.391 * 10 ⁶
234 milliards = 2.34 * 10 ¹¹
40 000 milliards = 4 * 10 ⁴ * 10 ⁹ = 4 * 10 ¹³
