The elder brother usually saves 55 yuan more pocket money than the younger sister. When donating to the Yushu disaster area, the elder brother donated 40% of his own pocket money, and the younger sister donated 45% of his own pocket money. At this time, the remaining money, brother is Twice as much as my sister, how much money did my brother save?
哥哥平时积攒的零用钱比妹妹多55元，在向玉树灾区捐款时，哥哥捐出了自己零用钱的40%，妹妹捐出了自己零用钱的45%，这时剩下的钱，哥哥是妹妹的2倍，原来哥哥积攒了多少钱？
<gadget id="calculator">55 * 2</gadget>
<output>110</output>

<gadget id="calculator">45 / 100</gadget>
<output>9/20 = around 0.45</output>

<gadget id="calculator">55 * (9/20) * 2</gadget>
<output>99/2 = around 49.5</output>

<gadget id="calculator">110 - (99/2)</gadget>
<output>121/2 = around 60.5</output>

<gadget id="calculator">40 / 100</gadget>
<output>2/5 = around 0.4</output>

<gadget id="calculator">(9/20) * 2</gadget>
<output>9/10 = around 0.9</output>

<gadget id="calculator">(2/5) - (9/10) - 1</gadget>
<output>-3/2 = around -1.5</output>

<gadget id="calculator">2 + (-3/2)</gadget>
<output>1/2 = around 0.5</output>

<gadget id="calculator">(121/2) / (1/2)</gadget>
<output>121</output>

<result>121</result>