A bonus of 4,500 yuan should be distributed between A and B. A gets 80% of B's share. How much bonus does B get?
要把4500元的奖金分给甲、乙两人，甲得的是乙的80%．乙得奖金多少元？
<gadget id="calculator">80 / 100</gadget>
<output>4/5 = around 0.8</output>

<gadget id="calculator">1 + (4/5)</gadget>
<output>9/5 = around 1.8</output>

<gadget id="calculator">4_500 / (9/5)</gadget>
<output>2_500</output>

<result>2_500</result>