The sum of the minuend, the subtrahend and the difference is 570, the subtrahend is 4 times of the difference, what is the subtrahend.
被减数、减数与差之和是570，减数是差的4倍，减数是多少．
<gadget id="calculator">570 / 2</gadget>
<output>285</output>

<gadget id="calculator">285 / 5</gadget>
<output>57</output>

<gadget id="calculator">57 * 4</gadget>
<output>228</output>

<result>228</result>