There are 357 students in the fifth grade. The ratio of male to female students is 4:3. How many more boys than girls?
五年级一共357人，男女生人数的比是4：3，男生比女生多多少人？
<gadget id="calculator">4 / 7</gadget>
<output>4/7 = around 0.571429</output>

<gadget id="calculator">3 / 7</gadget>
<output>3/7 = around 0.428571</output>

<gadget id="calculator">(4/7) - (3/7)</gadget>
<output>1/7 = around 0.142857</output>

<gadget id="calculator">357 * (1/7)</gadget>
<output>51</output>

<result>51</result>