There are red and white glass balls in a box, and the number of red balls is 2 times more than the number of white balls. Each time, 7 white balls and 15 red balls are taken out from the box. After several times, there are 3 white balls and 53 red balls left in the box. So, how many more red balls than white balls were there originally in the box?
箱子里有红、白两种玻璃球，红球数是白球数的3倍多2只．每次从箱子里取出7只白球和15只红球，经过若干次后，箱子里剩下3只白球，53只红球．那么，箱子里原来红球数比白球数多多少只？
<gadget id="calculator">53 / 15</gadget>
<output>53/15 = around 3.533333</output>

<gadget id="calculator">3 / 7</gadget>
<output>3/7 = around 0.428571</output>

<gadget id="calculator">2 / 15</gadget>
<output>2/15 = around 0.133333</output>

<gadget id="calculator">(53/15) - (3/7) - (2/15)</gadget>
<output>104/35 = around 2.971429</output>

<gadget id="calculator">3 / 15</gadget>
<output>1/5 = around 0.2</output>

<gadget id="calculator">1 / 7</gadget>
<output>1/7 = around 0.142857</output>

<gadget id="calculator">(1/5) - (1/7)</gadget>
<output>2/35 = around 0.057143</output>

<gadget id="calculator">(104/35) / (2/35)</gadget>
<output>52</output>

<gadget id="calculator">3 * 52</gadget>
<output>156</output>

<gadget id="calculator">2 - 52</gadget>
<output>-50</output>

<gadget id="calculator">156 + (-50)</gadget>
<output>106</output>

<result>106</result>