a=2*3*m, b=3*5*m (m is a natural number, and m≠0), if the greatest common factor of a and b is 15, then what is the least common multiple of a and b.
a=2*3*m，b=3*5*m(m是自然数，且m≠0)，如果a和b的最大公因数是15，那么a和b的最小公倍数是多少．
<gadget id="calculator">15 / 3</gadget>
<output>5</output>

<gadget id="calculator">2 * 3 * 5 * 5</gadget>
<output>150</output>

<result>150</result>