The definition of * operation is as follows: For two natural numbers a and b, the difference between their least common multiple and greatest common divisor is recorded as a*b. Calculation: 10*14=how much.
定义*运算如下：对两个自然数a和b，它们的最小公倍数与最大公约数的差记为a*b．计算：10*14=多少．
<gadget id="calculator">2 * 5 * 7</gadget>
<output>70</output>

<gadget id="calculator">70 - 2</gadget>
<output>68</output>

<result>68</result>