In this year's Learning from Lei Feng month, the sixth grade students did 200 good deeds, the number of fifth grade students did 5% less than the sixth grade, which was 95% of the fourth grade students, how many good deeds did the fourth grade students do.
在今年的学雷锋月里，六年级的同学做了200件好事，五年级同学做的件数比六年级的少5%，是四年级的95%，四年级同学做了多少件好事．
<gadget id="calculator">5 / 100</gadget>
<output>1/20 = around 0.05</output>

<gadget id="calculator">1 - (1/20)</gadget>
<output>19/20 = around 0.95</output>

<gadget id="calculator">200 * (19/20)</gadget>
<output>190</output>

<gadget id="calculator">95 / 100</gadget>
<output>19/20 = around 0.95</output>

<gadget id="calculator">190 / (19/20)</gadget>
<output>200</output>

<result>200</result>