There are two bags of glass balls, one bag has 68 balls, the other bag has 20 balls, each time take out 6 balls from the more bag and put them into the less bag, how many times do you take to make the two bags have the same amount of glass balls?
两袋玻璃球，一袋有68粒，另一袋有20粒，每次从多的一袋拿出6粒放入少的一袋，请问拿几次才能使两袋的玻璃球一样多？
<gadget id="calculator">68 - 20</gadget>
<output>48</output>

<gadget id="calculator">48 / 2 / 6</gadget>
<output>4</output>

<result>4</result>