What is the product of 7.8 minus the quotient of 3.6 divided by 18 and multiplying by 4?
7.8减去3.6除18的商，再乘4，积是多少？
<gadget id="calculator">18 / 3.6</gadget>
<output>5</output>

<gadget id="calculator">7.8 - 5</gadget>
<output>2.8</output>

<gadget id="calculator">2.8 * 4</gadget>
<output>11.2</output>

<result>11.2</result>