The greatest common divisor of two numbers is 15, and the least common multiple is 90. If one number is 30, what is the other number?
两个数的最大公约数是15，最小公倍数是90，已知一个数是30，另一个数是多少．
<gadget id="calculator">15 * 3</gadget>
<output>45</output>

<result>45</result>