A number of cows were raised in the pasture, and the number of cows was 6 times the number of bulls. Later, the number of cows and bulls increased by 60 each, and the number of cows was 4 times the number of bulls. So, how many cows did the ranch raise in total?
牧场里养了若干头牛，其中母牛数量是公牛数量的6倍，后来，母牛和公牛各增加了60头，这时母牛的数量是公牛数量的4倍．那么，原来牧场一共养了多少头牛．
<gadget id="calculator">60 * 4</gadget>
<output>240</output>

<gadget id="calculator">240 - 60</gadget>
<output>180</output>

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

<gadget id="calculator">180 / 2</gadget>
<output>90</output>

<gadget id="calculator">90 * 6</gadget>
<output>540</output>

<gadget id="calculator">90 + 540</gadget>
<output>630</output>

<result>630</result>