In a proportional formula, the two numbers that make up the inner term are 8 and 0.5 respectively, and one of the outer terms is 4, so what must be the other outer term.
在一个比例式中，组成内项的两个数分别是8和0.5，其中的一个外项是4，那么另一个外项一定是多少．
<gadget id="calculator">0.5 / 4</gadget>
<output>0.125</output>

<gadget id="calculator">8 * 0.125</gadget>
<output>1</output>

<result>1</result>