def chase(aSpeed, tSpeed, advantage):
    tSpot = tSpeed * advantage
    aSpot = 0
    currentTime = advantage
    counter = 1
    while counter < 10000000000:
        if (tSpot + (tSpeed / counter)) > (aSpot + (aSpeed / counter)):
            tSpot += tSpeed / counter
            aSpot += aSpeed / counter
            currentTime += 1 / counter
        else:
            counter *= 10


    currentTime = round(currentTime, 8)
    return (currentTime)


print(chase(6, 3, 2))
print(chase(10, 1, 10))