python-3.x - 数字应右对齐。如何？

Question

我正在尝试使所有数字右对齐，这是我的代码：

r=int(input('How many rows do you want?'))
while r<=0 :
    print('This value is not suitable')
    r=int(input('How many rows do you want?'))
c=int(input('How many columns do you want?'))
while c<=0 :
    print('This value is not suitable')
    c=int(input('How many columns do you want?'))

largest = (len(str(r**c)))
for i in range(1, r+1):
    for y in range(1, c+1):
        number = i**y
        tarp = ' ' * ((largest - len(str(number))))
        print(number, end = tarp) 
    print()