What is the quotient of the difference between 81.5 minus 59.4 and the product of 7.8 and 8.5?
81.5减去59.4的差，除7.8与8.5的积，商是多少？
<gadget id="calculator">7.8 * 8.5</gadget>
<output>66.3</output>

<gadget id="calculator">81.5 - 59.4</gadget>
<output>22.1</output>

<gadget id="calculator">66.3 / 22.1</gadget>
<output>3</output>

<result>3</result>