A wealthy man had an inheritance of 3.5 million yuan. Before he died, he wrote such a will to his pregnant wife. If he gave birth to a boy, he would give two-thirds of the inheritance to the son, and the mother would take one-third. If a daughter is born, one-third of the inheritance will be given to the daughter, and the mother will get two-thirds. As a result, his wife has twins with a son and a daughter. According to the requirements of the will, how much money can the mother get?
一位富豪有350万元遗产，在临终前，他对怀孕的妻子写下这样的一份遗嘱，如果生下来是男孩，就把遗产的三分之二给儿子，母亲拿三分之一，如果生下来是女儿，就把遗产的三分之一给女儿，母亲拿三分之二，结果他妻子生了一儿一女的双胞胎，按遗嘱要求，母亲可以得多少元？
<gadget id="calculator">2 / 1</gadget>
<output>2</output>

<gadget id="calculator">4 + 2 + 1</gadget>
<output>7</output>

<gadget id="calculator">2 / 7</gadget>
<output>2/7 = around 0.285714</output>

<gadget id="calculator">350 * (2/7)</gadget>
<output>100</output>

<result>100</result>