a, b, t = [int(i) for i in input().split()]

av_virus = 1

residual_t = t
scaling = 2
base = ((a+b) ** 1) // (2 ** 1)
while(residual_t > scaling):
    new_mult = base
    factor = 1
    while(factor * scaling <= residual_t):
        factor *= scaling
        new_mult = new_mult ** scaling
        new_mult = new_mult % ((10 ** 9) + 7)
    
    av_virus *= new_mult
    av_virus = av_virus % ((10 ** 9) + 7)
    residual_t -= factor


#while(residual_t > scaling):
#    fast_t = 1
#    fast_factor = base
#    while(fast_t*scaling <= residual_t):
#        fast_factor = fast_factor ** scaling
#        av_virus *= fast_factor
#        av_virus = av_virus % ((10 ** 9) + 7)
#        fast_t *= scaling
    
    #fast_factor = int(float(residual_t) / fast_t)
    #av_virus *= ((a+b) ** fast_factor) // (2 ** fast_factor)
    #av_virus = av_virus % ((10 ** 9) + 7)
    #fast_t *= fast_factor
#    residual_t -= fast_t


av_virus *= base ** residual_t
av_virus = av_virus % ((10 ** 9) + 7)
print(int(av_virus))