每块蛋糕4元钱,7块这样的蛋糕多少元钱?7k:`-r.G7D3?)o,d.f;M9}
算式:提示'_4[6|0[(t6w1a1v0h0P4U,w3J2D3t8i:C:\3P*w7k:`-r.G7D3?)o,d.f;M9}
答;7块这样的蛋糕.j9z6z'X+Z7r+q0P元钱。7k:`-r.G7D3?)o,d.f;M9}