Recycling 1 kg of waste paper can produce 0.8 kg of recycled paper. If each person recycles 1.7 kilograms of waste paper, how many kilograms of recycled paper can be produced from the waste paper recycled by a class of 42 people in the fourth grade?
回收1千克废纸，可生产0.8千克再生纸．如果每人回收1.7千克废纸，四年级一班42人回收的废纸可生产多少千克再生纸？
<gadget id="calculator">0.8 * 1.7 * 42</gadget>
<output>57.12</output>

<result>57.12</result>