There are two natural numbers M and N, the greatest common divisor is 14, and the least common multiple is 280, then, what is the minimum value of M+N?
有两个自然数M、N，最大公约数是14，最小公倍数是280，那么，M+N最小值是多少．
<gadget id="calculator">2 * 7 * 2 * 2</gadget>
<output>56</output>

<gadget id="calculator">2 * 7 * 5</gadget>
<output>70</output>

<gadget id="calculator">56 + 70</gadget>
<output>126</output>

<result>126</result>