The school is going to distribute skipping ropes to 28 classes, each class has 72 ropes, and the whole school needs to keep 50 ropes for spare. How many jump ropes should schools buy?
学校准备发跳绳，发给28个班，每个班72根，全校还需要留50根备用．学校应买多少根跳绳？
<gadget id="calculator">72 * 28</gadget>
<output>2_016</output>

<gadget id="calculator">2_016 + 50</gadget>
<output>2_066</output>

<result>2_066</result>