What is the number that is 1.5 less than the product of 5.2 and 3.5?
比5.2与3.5积少1.5的数是多少．
<gadget id="calculator">5.2 * 3.5</gadget>
<output>18.2</output>

<gadget id="calculator">18.2 - 1.5</gadget>
<output>16.7</output>

<result>16.7</result>