Mom brought a sum of money to buy meat. If you buy 6 kilograms of beef, there is still a difference of 8 yuan. If you buy 7 kilograms of pork, there is still 2 yuan left. It is known that beef is more expensive than pork by 4 yuan per kilogram. How much money did mother bring?
妈妈带一笔钱去买肉．如果买牛肉6千克，还差8元，如果买猪肉7千克，还剩2元，已知牛肉比猪肉每千克贵4元．妈妈带了多少元钱？
<gadget id="calculator">6 * 4</gadget>
<output>24</output>

<gadget id="calculator">24 - 8</gadget>
<output>16</output>

<gadget id="calculator">16 - 2</gadget>
<output>14</output>

<gadget id="calculator">7 - 6</gadget>
<output>1</output>

<gadget id="calculator">14 / 1</gadget>
<output>14</output>

<gadget id="calculator">7 * 14</gadget>
<output>98</output>

<gadget id="calculator">98 + 2</gadget>
<output>100</output>

<result>100</result>