let\'s translate to decimal like this:
1∙29+1∙28+1∙27+1∙26+1∙25+1∙24+1∙23+1∙22+1∙21+1∙20+0∙2-1+0∙2-2+1∙2-3 = 1∙512+1∙256+1∙128+1∙64+1∙32+1∙16+1∙8+1∙4+1∙2+1∙1+0∙0.5+0∙0.25+1∙0.125 = 512+256+128+64+32+16+8+4+2+1+0+0+0.125 = 1023.12510
got It: 1111111111.0012 =1023.12510