q8.py

bignum = "7316717653133062491922511967442657474235534919493496983520312774506326239578318016984801869478851843858615607891129494954595017379583319528532088055111254069874715852386305071569329096329522744304355766896648950445244523161731856403098711121722383113622298934233803081353362766142828064444866452387493035890729629049156044077239071381051585930796086670172427121883998797908792274921901699720888093776657273330010533678812202354218097512545405947522435258490771167055601360483958644670632441572215539753697817977846174064955149290862569321978468622482839722413756570560574902614079729686524145351004748216637048440319989000889524345065854122758866688116427171479924442928230863465674813919123162824586178664583591245665294765456828489128831426076900422421902267105562632111110937054421750694165896040807198403850962455444362981230987879927244284909188845801561660979191338754992005240636899125607176060588611646710940507754100225698315520005593572972571636269561882670428252483600823257530420752963450"

def prod(l):
    prod = 1
    for i in range(len(l)):
        prod = prod * l[i]
    return prod

s = 13
maximum = 0
for i in range(len(bignum) - s):
    #snip out a section of the big number
    section = bignum[i:i+s]

    #grab the constituent digits
    #and calculate the product
    product = 1
    for i in range(s):
        v = int(section[i])
        product = product * v

    if  product > maximum:
        maximum = product
        print("Section: {}, prod: {}, max: {}".format(section, product, maximum))