Four times a number is 12.5 less than 38.3, what is this number?
一个数的4倍比38.3少12.5，这个数是多少？
<gadget id="calculator">38.3 - 12.5</gadget>
<output>25.8</output>

<gadget id="calculator">25.8 / 4</gadget>
<output>6.45</output>

<result>6.45</result>