Column calculation: 15.86 minus the sum of 2.86 and 5.6, what is the difference?
列式计算：15.86减去2.86与5.6的和，差是多少？
<gadget id="calculator">2.86 + 5.6</gadget>
<output>8.46</output>

<gadget id="calculator">15.86 - 8.46</gadget>
<output>7.4</output>

<result>7.4</result>