The greatest common factor of two natural numbers is 14, and the least common multiple is 280. What is the sum of these two natural numbers?
两个自然数的最大公因数是14，最小公倍数是280，这两个自然数的和是多少．
<gadget id="calculator">2 * 7 * 4</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>