Wang Wei and Zhang Hua collected a total of 70 pictures. After Wang Wei gave (1/6) of his pictures to Zhang Hua, the two had the same number of pictures. How many pictures did Zhang Hua originally have?
王伟和张华一共收集70张画片，王伟把自己画片的(1/6)送给张华后，两人画片的张数一样多，张华原本有多少张画片．
<gadget id="calculator">1 / 6</gadget>
<output>1/6 = around 0.166667</output>

<gadget id="calculator">1 - (1/6) - (1/6)</gadget>
<output>2/3 = around 0.666667</output>

<gadget id="calculator">(2/3) + 1</gadget>
<output>5/3 = around 1.666667</output>

<gadget id="calculator">70 / (5/3)</gadget>
<output>42</output>

<gadget id="calculator">70 - 42</gadget>
<output>28</output>

<result>28</result>