本来想不用高精度过掉的，现在要被 python 的各种玄学问题逼疯了，求助玄关。

from decimal import *
import sys
getcontext().prec=200
la=0
lb=-1
while 1:
    qaq=input()
    w=len(qaq)
    for i in range(w-1):
        if qaq[i]==' ':
            a=Decimal(qaq[:i])
            b=Decimal(qaq[i+1:])
    if la==a and lb==b:
        exit(0)
    c=str(a**b)
    d=len(c)
    for i in range(d-1,-1,-1):
        if c[i]=='0' :
            c=c[:i]
        else:
            break
    d=len(c)
    siz=0
    for i in range(d-1,-1,-1):
        if c[i]=='E':
            siz=int(c[i+2:])
            c=c[:i]

    
    if siz>0:
        print('.',end='')
        for i in range(siz-1):
            print(0,end='')
        d=len(c)
        for i in range(d):
            if c[i]=='.':
                c=c[:i]+c[i+1:]
                break
        print(c)
    else:
        print(c)
    la=a
    lb=b