If 10 rabbits can be exchanged for 2 sheep, 9 sheep can be exchanged for 3 pigs, and 8 pigs can be exchanged for 2 cows, then how many rabbits can be exchanged for 5 cows?
假如用10只兔子可以换2只羊，9只羊换3头猪，8头猪可以换2头牛，那么5头牛可以换多少只兔子．
<gadget id="calculator">8 / 2</gadget>
<output>4</output>

<gadget id="calculator">9 / 3</gadget>
<output>3</output>

<gadget id="calculator">10 / 2</gadget>
<output>5</output>

<gadget id="calculator">4 * 3 * 5</gadget>
<output>60</output>

<gadget id="calculator">60 * 5</gadget>
<output>300</output>

<result>300</result>