Calculation: 24/15*45/7*21/4.
计算：24/15*45/7*21/4．
<gadget id="calculator">24 / 15</gadget>
<output>8/5 = around 1.6</output>

<gadget id="calculator">45 / 7</gadget>
<output>45/7 = around 6.428571</output>

<gadget id="calculator">21 / 4</gadget>
<output>21/4 = around 5.25</output>

<gadget id="calculator">(8/5) * (45/7) * (21/4)</gadget>
<output>54</output>

<result>54</result>