A batch of cloth was originally planned to make 600 sets of clothing. Because each set saved 0.4 meters of cloth, 50 more sets were made. How many meters is this batch of cloth?
一批布原计划做服装600套，因每套节省布0.4米，结果多做50套，这批布有多少米？
<gadget id="calculator">600 / 50</gadget>
<output>12</output>

<gadget id="calculator">0.4 * 12</gadget>
<output>4.8</output>

<gadget id="calculator">600 + 50</gadget>
<output>650</output>

<gadget id="calculator">4.8 * 650</gadget>
<output>3_120</output>

<result>3_120</result>