"What is the quotient of the sum of 30 and 60 divided by the difference between 25 and 10?" What is the correct formula?
"30与60的和，除以25与10的差，商是多少？"正确列式为多少．
<gadget id="calculator">30 + 60</gadget>
<output>90</output>

<gadget id="calculator">25 - 10</gadget>
<output>15</output>

<gadget id="calculator">90 / 15</gadget>
<output>6</output>

<result>6</result>