233.61 * x^3 - 75.877*x^2 + 4.4278 *x + 0.0022585=0
    x^2-3x-4=0
     （1080-x）*22.5*22.5*3.14*7.85+1/3*3.14x（22.5*22.5+22.5*14+14*14）*7.85 = 11.5/0.000001
    （1080-x）*22.5*22.5*3.14*7.85+1/3*3.14x（22.5*22.5+22.5*14+14*14）=11.5/0.000001
    （300-5x）（4+x）=1680
    （300-5x）（4+x）
    （X-X/1.13*0.13+0.01688）/7.17=0.077938328
    （X-X/1.13*0.13+0.01688）/7.17=0.07468
    （0.586-0.586/1.13*0.13+0.01688）/7.17=X
    （0.586-0.586/1.13*0.1+0.01688）/7.07=X
    （0.576-0.576/1.13*0.1+0.01688）/7.07=X
    （0.576-0.576/1.13*0.13+0.01688）/7.07=X
    （0.576-0.576/1.13*0.13+0.01688）/7.1688=X
    x^2-18.2x+82.6=0
    x^2-9.5x+18.8=0
    720(x+1)^2=2205
    X－0.2X＝1500
    5*x^2+3=4*x^2+4*x
    114514+X=1919810
    （x-2）*(x+2)=2*x-4

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