There are 420 boys in a certain elementary school, and there are more girls than boys (1/7). How many girls are there?
某小学有男生420人，女生比男生多(1/7)，女生有多少人？
<gadget id="calculator">1 / 7</gadget>
<output>1/7 = around 0.142857</output>

<gadget id="calculator">420 * (1/7)</gadget>
<output>60</output>

<gadget id="calculator">420 + 60</gadget>
<output>480</output>

<result>480</result>