Add 0.72 to the product of 0.9 and 0.6, divide the sum by 0.6, what is the quotient?
0.72加上0.9与0.6的积，所得的和除以0.6，商是多少？
<gadget id="calculator">0.9 * 0.6</gadget>
<output>0.54</output>

<gadget id="calculator">0.72 + 0.54</gadget>
<output>1.26</output>

<gadget id="calculator">1.26 / 0.6</gadget>
<output>2.1</output>

<result>2.1</result>