There are 60 boys in sixth grade in Mingde Primary School, 1/7 fewer than girls. How many girls are there in sixth grade in this school?
明德小学六年级有男生60人，比女生少(1/7)，这所学校六年级有女生多少人？
<gadget id="calculator">1 / 7</gadget>
<output>1/7 = around 0.142857</output>

<gadget id="calculator">1 - (1/7)</gadget>
<output>6/7 = around 0.857143</output>

<gadget id="calculator">60 / (6/7)</gadget>
<output>70</output>

<result>70</result>