There are 8 yellow balls and several white balls in a bag, they are identical except for the color, draw a ball randomly, if the probability of drawing a yellow ball is (4/5), then how many white balls are less than the yellow balls.
袋子中有8个黄球和若干白球，它们除了颜色外完全相同，从中任意摸出一个球，若摸出黄球的可能性是(4/5)，则白球比黄球少多少个．
<gadget id="calculator">4 / 5</gadget>
<output>4/5 = around 0.8</output>

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

<gadget id="calculator">10 - 8</gadget>
<output>2</output>

<gadget id="calculator">8 - 2</gadget>
<output>6</output>

<result>6</result>