Least Common Multiple of 20 and 58 by Listing Multiples

Multiples of 20: 20, 40, 60, 80, 100, 120, 140, 160, 180, 200, 220, 240, 260, 280, 300, 320, 340, 360, 380, 400, 420, 440, 460, 480, 500, 520, 540, 560, 580, 600, 620, …
Multiples of 58: 58, 116, 174, 232, 290, 348, 406, 464, 522, 580, …
LCM(20, 58) = 580