The greatest common factor of two numbers A and B is 18, and the least common multiple is 270. It is known that the number A is 54, and what is the number B.
甲、乙两数的最大公因数是18，最小公倍数是270，已知甲数是54，乙数是多少．
<gadget id="calculator">18 * 5</gadget>
<output>90</output>

<result>90</result>