Divide the 360 books among the fourth, fifth, and sixth grades according to 4:5:6.
把360本书按4：5：6分给四、五、六年级，分得最多的年级比分得最少的年级多多少本．
<gadget id="calculator">4 + 5 + 6</gadget>
<output>15</output>

<gadget id="calculator">6 / 15</gadget>
<output>2/5 = around 0.4</output>

<gadget id="calculator">360 * (2/5)</gadget>
<output>144</output>

<gadget id="calculator">4 / 15</gadget>
<output>4/15 = around 0.266667</output>

<gadget id="calculator">360 * (4/15)</gadget>
<output>96</output>

<gadget id="calculator">144 - 96</gadget>
<output>48</output>

<result>48</result>