There are several red and white balls, if one red ball and one white ball are taken away each time, when there are no more red balls, there are still 50 white balls left; if one red ball and three white balls are taken away each time, the When there are no more white balls, there are still 50 red balls left. Then, how many red balls and white balls are there in this pile?
有红、白球若干个，若每次拿走1个红球和1个白球，等到没有红球时，还剩下50个白球；若每次拿走1个红球和3个白球，则拿到没有白球时，红球还剩下50个，那么，这堆红球、白球共多少个．
<gadget id="calculator">50 / 3</gadget>
<output>50/3 = around 16.666667</output>

<gadget id="calculator">(50/3) + 50</gadget>
<output>200/3 = around 66.666667</output>

<gadget id="calculator">1 / 3</gadget>
<output>1/3 = around 0.333333</output>

<gadget id="calculator">1 - (1/3)</gadget>
<output>2/3 = around 0.666667</output>

<gadget id="calculator">(200/3) / (2/3)</gadget>
<output>100</output>

<gadget id="calculator">100 + 50 + 100</gadget>
<output>250</output>

<result>250</result>