Pour 9 liters of water into a cuboid container with a length of 50 cm and a width of 45 cm. What is the height of the water?
把9升水倒入一个里面长是50cm，宽是45cm的长方体容器里，水的高度是多少？
<gadget id="calculator">50 * 45</gadget>
<output>2_250</output>

<gadget id="calculator">1_000 / 2_250</gadget>
<output>4/9 = around 0.444444</output>

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

<result>4</result>