A, B, C, and D make a total of 395 parts. If A makes 5 more parts, B makes 10 fewer parts, the number made by C is multiplied by 2, and the number made by D is divided by 4, then the number of parts made by the four people is exactly equal. How many did Ding make? (column equation solution)
甲、乙、丙、丁四人共做零件395个．如果甲多做5个，乙少做10个，丙做的个数乘以2，丁做的个数除以4，那么四个人做的零件数恰好相等．丁做了多少个？(列方程解答)
<gadget id="calculator">395 - 10</gadget>
<output>385</output>

<gadget id="calculator">5 + 385</gadget>
<output>390</output>

<gadget id="calculator">1 / 2</gadget>
<output>1/2 = around 0.5</output>

<gadget id="calculator">1 + 1 + (1/2) + 4</gadget>
<output>13/2 = around 6.5</output>

<gadget id="calculator">390 / (13/2)</gadget>
<output>60</output>

<gadget id="calculator">60 * 4</gadget>
<output>240</output>

<result>240</result>