What is the product of the sum of 12 and 21 (4/3)?
12与21的和乘(4/3)，积是多少？
<gadget id="calculator">12 + 21</gadget>
<output>33</output>

<gadget id="calculator">4 / 3</gadget>
<output>4/3 = around 1.333333</output>

<gadget id="calculator">33 * (4/3)</gadget>
<output>44</output>

<result>44</result>