Samsung Electronics Co. said Tuesday its operating profit shot up more than tenfold in the first quarter, with its chip business shifting to the black for the first time in five quarters. Samsung Electronics, the world's largest maker of smartphones and memory chips, said its operating profit reached 6.6 trillion won ($4.8 billion) for the January-March period, compared with 640.2 billion won a year ago. Its sales jumped 12.8 percent to 71.9 trillion won, and net profit soared 329 percent t