The greatest common divisor of two numbers A and B is 5, and the least common multiple is 120. Now that the number of A is 40, what is the number of B?
甲，乙两个数最大公约数是5，最小公倍数是120，现甲数为40，乙数是多少．
<gadget id="calculator">5 / 40</gadget>
<output>1/8 = around 0.125</output>

<gadget id="calculator">120 * (1/8)</gadget>
<output>15</output>

<result>15</result>