The ratio of 24 to 4 is equal to the ratio of 4x to 9.
24和4的比值4x和9的比值相等．
<gadget id="calculator">24 / 4</gadget>
<output>6</output>

<gadget id="calculator">6 * 9</gadget>
<output>54</output>

<gadget id="calculator">54 / 4</gadget>
<output>27/2 = around 13.5</output>

<result>27/2 = around 13.5</result>