The number A=2*a*5, the number B=2*a*5*7, the greatest common divisor of the two numbers A and B is 30, what is the least common multiple.
甲数=2*a*5，乙数=2*a*5*7，甲、乙两个数的最大公约数是30，最小公倍数是多少．
<gadget id="calculator">30 * 7</gadget>
<output>210</output>

<result>210</result>