Xiaoqiang's father took out 1/5 of one month's salary and just bought 4 chairs with a unit price of 80 yuan. How much is Xiaoqiang's father's monthly salary?
小强的爸爸拿出一个月工资的(1/5)，正好买了4张单价是80元的椅子．小强的爸爸一个月的工资是多少元？
<gadget id="calculator">1 / 5</gadget>
<output>1/5 = around 0.2</output>

<gadget id="calculator">4 / (1/5)</gadget>
<output>20</output>

<gadget id="calculator">80 * 20</gadget>
<output>1_600</output>

<result>1_600</result>