M=1000000007
s,t=ARGF.gets_to_end.split
m=t.to_i
a=[0_i64]*m;a[z=0]+=1
s.size.times{|i|d=s[i].to_i;f=d==0?1:0;z+=f;b=a.dup;m.times{|j|k=(10*j+d)%m;b[k]=b[k]+a[j]-f;f=0};a=b}
p (a[0]-1+z)%M