5 times of a number is 12 less than 7 times, what is this number?
一个数的5倍比7倍少12，这个数是多少？
<gadget id="calculator">7 - 5</gadget>
<output>2</output>

<gadget id="calculator">12 / 2</gadget>
<output>6</output>

<result>6</result>