A pile of straw weighs 120kg, and 45% of it has been eaten. How many kilograms are left uneaten?
一堆稻草有120kg，已经吃了45%，还剩多少kg没吃？
<gadget id="calculator">45 / 100</gadget>
<output>9/20 = around 0.45</output>

<gadget id="calculator">1 - (9/20)</gadget>
<output>11/20 = around 0.55</output>

<gadget id="calculator">120 * (11/20)</gadget>
<output>66</output>

<result>66</result>