There are 3 people in the naughty family. In May, the salary of the mother is 1400 yuan, and the salary of the father is more than that of the mother (2/7). How much is the salary of the father?
淘气家有3口人，五月份妈妈的工资收入是1400元，爸爸的工资收入比妈妈多(2/7)，爸爸的工资收入是多少元？
<gadget id="calculator">2 / 7</gadget>
<output>2/7 = around 0.285714</output>

<gadget id="calculator">1_400 * (2/7)</gadget>
<output>400</output>

<gadget id="calculator">400 + 1_400</gadget>
<output>1_800</output>

<result>1_800</result>