The breeder of the zoo distributes peanuts to three groups of monkeys. If it is only distributed to the first group, each monkey can get 12 peanuts; if it is only distributed to the second group, each monkey can get 15 peanuts; If there are three groups, each monkey can get 20 pills. Then give three groups of monkeys on average, how many grains can each get.
动物园的饲养员给三群猴子分花生，如只分给第一群，则每只猴子可得12粒；如只分给第二群，则每只猴子可得15粒；如只分给第三群，则每只猴子可得20粒．那么平均给三群猴子，每只可得多少粒．
<gadget id="calculator">2 * 2 * 3 * 5</gadget>
<output>60</output>

<gadget id="calculator">60 / 12</gadget>
<output>5</output>

<gadget id="calculator">60 / 15</gadget>
<output>4</output>

<gadget id="calculator">60 / 20</gadget>
<output>3</output>

<gadget id="calculator">5 + 4 + 3</gadget>
<output>12</output>

<result>5</result>