A container, its inner size is 18*18*18. There is a batch of cargo boxes, the outer dimensions of which are 1*4*9. How many boxes can this container hold.
一个集装箱，它的内尺寸是18*18*18．现有一批货箱，它的外尺寸是1*4*9．问这个集装箱能装多少个货箱．
<gadget id="calculator">4 * 4</gadget>
<output>16</output>

<gadget id="calculator">1 * 4 * 9</gadget>
<output>36</output>

<gadget id="calculator">18 / 36</gadget>
<output>1/2 = around 0.5</output>

<gadget id="calculator">18 * 16 * (1/2)</gadget>
<output>144</output>

<gadget id="calculator">9 * 1 * 4</gadget>
<output>36</output>

<gadget id="calculator">16 / 36</gadget>
<output>4/9 = around 0.444444</output>

<gadget id="calculator">18 * 2 * (4/9)</gadget>
<output>16</output>

<gadget id="calculator">144 + 16</gadget>
<output>160</output>

<result>160</result>