80% of the number A is equal to 30% of the number B. Given that the reciprocal of the number A is 3+(1/5), what is the number B?
甲数的80%与乙数的30%相等，已知甲数的倒数是3+(1/5)，乙数是多少．
<gadget id="calculator">1 / 5</gadget>
<output>1/5 = around 0.2</output>

<gadget id="calculator">3 + (1/5)</gadget>
<output>16/5 = around 3.2</output>

<gadget id="calculator">1 / (16/5)</gadget>
<output>5/16 = around 0.3125</output>

<gadget id="calculator">80 / 100</gadget>
<output>4/5 = around 0.8</output>

<gadget id="calculator">30 / 100</gadget>
<output>3/10 = around 0.3</output>

<gadget id="calculator">(4/5) / (3/10)</gadget>
<output>8/3 = around 2.666667</output>

<gadget id="calculator">(5/16) * (8/3)</gadget>
<output>5/6 = around 0.833333</output>

<result>5/6 = around 0.833333</result>