vue js 乘法函数，用来得到精确的乘法结果

accMul(arg1, arg2) {

var m =0, s1 = arg1.toString(), s2 = arg2.toString();

  try {

m += s1.split(".")[1].length

  }catch (e) {

}

try {

m += s2.split(".")[1].length

  }catch (e) {

}

return Number(s1.replace(".", "")) *Number(s2.replace(".", "")) /Math.pow(10, m)

}