A rectangle is 5 decimeters long and 0.3 meters wide. What is the area of the remaining part after cutting out the largest square in the rectangle?
一个长方形，长5分米，宽0.3米，在长方形内剪去一个最大的正方形后，剩下部分的面积是多少平方厘米．
<gadget id="calculator">5 * 10</gadget>
<output>50</output>

<gadget id="calculator">0.3 * 100</gadget>
<output>30</output>

<gadget id="calculator">50 * 30</gadget>
<output>1_500</output>

<gadget id="calculator">30 * 30</gadget>
<output>900</output>

<gadget id="calculator">1_500 - 900</gadget>
<output>600</output>

<result>600</result>